Tire rim breaking machine



vJune 16; 1931. A. s. GRAY 1,810,881

TIRE RIM BREAKING MACHINE Filed Aug. 14, 1930 2 Sheets-Sheer L June 16,1931. A. s. GRAY Y 1,810,881

TIRE RIM BREAKING MACHINE Fild Aug. 14, 1930 2 Sheets-Sheet 2 PatentedJune 16, 1931 f UNITED STATES miel:Nr ePrice-'fi' y' ALBERT seriestv, orvfjnNAfreHnn, WASHINGTON, AssIGNon- @LONE-HALE 'ro vJOHN nnvinonnrnrmonWENATGHEE; WASHINGTON Y TIRE RIM BREAKING MACHINE ApplicationvledAugust`14, 1930 Serial No.l 4754,:336.

This invention relates. to improvements in tire rimv contracting andexpanding machines designed to facilitate the Yrenioval of tires fromtheir rims and the placing of tires on their rims. n

The primary object ofV the present invention is to provide a machineofthe above described character, operated by an electric motor andV so`designedthat the ruiming of the motor will be stopped automatically whenthe rim upon which the machine is op.- eratinghas been opened to theproperdegree or when it has been expanded to the proper position in the`tire.

Another ob.'.ee t of the invention is to provide amachineof. the abovedescribed character which is of simple and compact con,-

struction, strong and durable and having a minimum of moving or Workingparts.

The invention will be best understood from a conside-ration of thefollowing detailed description taken in connection With the.accompanying drawings forming part of this spec- Y -iiicatiom with theimderstandl-ng, however, f2.5"

ing a tire rim in position thereon, a covering for the Working' partsbeing removed.

- F gure2 isa sectional View of the machine taken on the line 27o-ZotFigure 1.

Wfl

i line 1rd 0f Figure 1.

Figure 3 is a sectional View taken onthe line 3-.3 o'Figure'l.

Figure Ll-is a sectional view taken on the Figure 5 is a planview olfthe. underside of the coverV lfor the werking parts of thc .maohneFigure 6 is a sec-tional View taken on the line @f6 of Figure 1.

Referring more particularly to the dravvi ings wherenlike numerals of;referencey indi- Cate eorrespondmg parts throughout theSeveralveWS-.ithe numeral 1 indicates e orouliel casing in which themovlgrerte i the present machine are houeedc,.the easing being mountedupon. supporting lese 2 whehmanftain it at a heightoonverieet'foranoperetor to place in, position thereon, or remove there: from a tirerim such for example'` as is indi; Gated by the numeral. it. This easingl lierrevided with @over or lid. 41: as shown in, Fgure. 2.,. thev edgeof whioh bordered, by* e iange which4 overlies the. outer ieee o' JCloeeasing and maintains the. top ofthe cover in position. c .n Y

Within the easing 1 1' there are, Seemed et dalnetrioally opppoetepoints the brackets 6 and 7 the bracket 6 having, a .central bar Portion8 connected to tnewall o theeasing by the :regularly directed lege. 9`whlleithe Vbracket 7 has a central Pooll lOYWhoh is 'parallel with thebar 8. and the short leg portions' l1 which are obliquely directed as ishown and connected with, the casing wall in the same manner as.theleg-e 9 connect the a bar 8 to the casing. The vparallellaars7 8 and10. are apertured on a line, which. passes thro-ugh the radialcenter ofthe casing and Connecting these bars. andhaving its; ende passingthrough the apertures thereo iS e screw 12. One. end of the Sor-,ew isloosely mounted in thebar 8 While the other end has secured thereaboutapair of collars@ 13 which are disposed upon opposite. sides of the bar10and prevent longitudinal movemenli of the screw. v

Disposed between the bar 1Q and the adja cent. Wallet the casing is aspirall gear 1li which has the adjacent ooller'l. east integral-Jllelewith, this gear being n iounted upon andsecured to the screw 12as shown.

Secured to the supporting plate 15 which is mounted upon the undersideof the casing 1 is an electric motor 16, the 17 fof which is verticallydisposed and passes into w1the space between the bracket' 7 and theeasing wall. 'Y The upper endof this shaft 17 of the motor has e? Wormgear 18 mounted thereon which meshes Withthe gear 14.

to each of the legs 11 of the bracket 7, and mounted upon the. Wall othe easing l, ie e Disposed adjacent and in spaced relation block 19 andeach of these blocks has a passage formed horizontally therethrough inalignment with a similar passage formed in the adjacent bracket leg forthe reception of a pin 20 which is insertedthrough an aligned tangentialaperture in the wall of the casing, as shown in Figure l.

The wall of the casing 1 is provided with a pair of apertures 21Y eachlof which opens therethrough between a block 19 and a leg 11 and each ofthese apertures receives one end of an arm 22 which is provided with aplurality of apertures 23 one of which is aligned with the aperturesthrough which wg. the adjacent pin passes sopas t permit the passage ofthe pin which holds'the arm in position. ,Each of the arms 22 whichextends radially from the wall of the casing 1 is enlarged at its outerend forming the head 24, one side of which head is formed to provide ahook 25 upon which an edge oi the rim 3 may rest.

The wall of thecasing lis provided with a second pair of apertures eachof which is inf dicated by the numeral 26 and as shown each of theseapertures is relativelywide and is located adjacent the outer side ofaleg 9 of the bracket 6. lThrough each of the apertures 26 there extendsa shiftable arm 25, the

' t outer end of which is enlarged to form the head 28 which has at oneside theintegral hook 29 and at the other side the pivotally mountedhook 30 which coacts with the adjacent integral hook to grip theedges ofthe tire rim as clearly shown in Figure 3.

@ne of these arms 25 is of slightly greater Vlength than the other, thediierence in length Yas the arms are positioned.

amounting substantially tothe thickness of the tire rim. i

At their inner ends each" of the'arms 25 is reduced as indicated Vby thenumeral 31 to form an ear whichpositions between a pair of similarlyformed ears 32formed at the end of a reciprocating block33. This blockV33 is provided with .a central transverse between the ends" of theshiftable arms'25,

upon the operation of the Ymotor 16. to turn the shaft -17 and the screw12 in the right direction the arms 25 will be drawn inwardly.

Since one of the shiftable arms is of greater length than the other, theincreased length being in the hooks 29 and 30 thereof so that thearmwill move adistance substantially equal to the thickness of therim'before the 'hooks begin to pull thereon, it will be readily given ofthe seen that one end of the rim will be drawn in before the other sothat the breaking thereof may be effectively accomplished. It will,ofcourse, be obvious upon a reversal of the operation of the motor thereverse operation will take place to restore the rim to its formercondition.

The control switch for the motor 16 is mounted upon the lid 4 asindicated at 35 and there is also mounted` upon the lid in circuit withthe control switch, a reversing switch 36 so that the rotation of themotor 16 may be readily controlled. In order to protect the mechanismshould the attendant of the machine not turn ofi' the motor at theproper moment there are provided the cut-oit' switches 37 each ofwhichis controlled by an arm 38. As shown in Figure 5 these arms areoppositely directed and each terminates in a right angularly extendingportion 39 which portions are so disposed as to be in the path ot travelof an end of the shiftable block From this it will be readily obviousthat when the mechanism is set into operation, as for example from theposition shown in Figurel, the reciprocating block 33 will Vmove towardtheremote angularly extending portion 39 of theremote arm 38 and when itcomes into cont-act. with this switch arm the switch will be opened andthe' circuit to the motor broken. When the tire rim is to be restored tonormal condition the blockv 33, of course, travels inthe oppositedirection and then when 4it reaches the limit of its movement it comesinto contact with the other switch control arm 38 opening this switchand vbreaking the motor circuit inthe'same manner. i

It will, of course, be readily seen that by moving the normally fixedarms 22 inwardly" necting body between the adjacent ends of the lastmentioned pair of arms, said arms being ormedkat their outer ends t'oengage and support a tire rim, a horizontallyfdis- `posed screw memberthreadably extended through said body, a-gear carriedby said screw, anelectric motor vcarried by said lcasing and having a worm connected withsaid gear, and switch controlmeans for said motor. Y j p v 2. A tire rimbreaking machine, comprising acircular casing, a pair of arms extendingthrough the wall and radially of the casing, a second pair of armsextending radially of the casing, a connecting body between the adjacentends of the last mentioned pair of arms, said arms being formed at theirouter ends to engage and support a tire rim, a hori- Zontally disposedstationary screw meinber threadably extended through said body, a gearcarried by said screw, an electric motor suspended Vbeneath and carriedby said casing and having the armature shaft thereof verticallydisposedand carrying a worm connected with said gear, switch control means forsaid motor, and means for adjusting said rst mentioned pair of armsradially of and securing them to said casing to accommodate the machineto tire rims of different sizes.-

3. A tire rim breaking machine, comprising a casing having a circularside wall, a pair of brackets disposed within the casing atdiametrically opposite points, a screw member having its ends rotatablysupported by saidl brackets and carrying a gear upon one end thereof, ablock body having said screw extended therethrough and in threadedconnection therewith, a pair of arms each connected at one end with saidblock and extending through the casing wall and provided at its otherend with means for engaging a. rim, a second pair of arms radiallyadjustable through said casing wall and disposed at opposite sides of abracket and further having means at their outer ends for engaging a tirerim, a removable elementY coupling the inner ends of the last mentionedarms with the casing to maintain the arms in adjusted position, andpower means connected with said gear for moving said block and the armsjoined thereto.

4. A tire rim breaking tool, comprising a circular casing, a pair of.brackets disposed at diametrically opposite points within the casing, ascrew rotatably mounted between and supported by said brackets, 'a pairof arms extending radially from the casing through the wall thereof uponopposite sides of a bracket, a block member having threaded connectionwith the screw for movement thereby and having the inner ends of saidarms pivoted thereto, a second pair of arms each extending radiallythrough the casing wall and each having a longitudinally extendingseries of apertures therethrough at the inner end, pin members eachremovably extended t-hroughthe casing wall and a portion of the'lastmentioned bracket and adapted to engage in an aperture of an adjacentarm, said arms being formed at their outer ends to engage a tire rim,and motor means for rotating said screw.

5. In a tire rim breaking machine, a casing, a screw disposed withinsaid casing between the planes of the sides thereof, a block bodymounted upon and having threaded connection with said screw to be movedthereby within the casing, a pair of arms disposed signature.

upon opposite sides of said screw and having pivotal connection withsaid body and further extending radially from said casing, said armsbeing moved with and by the body, a second pair of arms extendingradially from the casing and lixed with relation tothe first mentionedarms, a gear mounted upon one end of said screw, anoperating motorhaving a pinion meshing with said gear, a pair of switch members eachcontrolling the operation of said motor and disposed within the casingwith said screw therebetween, each of `said switches having an armdisposed sub-- stantially parallel to the screw and terminating in aninwardly directed portion, the inwardly directed portion of each switcharm being located adjacent one end of the screw to be engaged by thebody upon its movement to that end, and means upon the outer end of eachof said first mentioned arms for engaging a tire rim surrounding thecasing.

In testimony whereof I hereunto affix my ALBERT s. GRAY.

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